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IntelliJ IDEA14 已经发布一段时间了，突然心血来潮想体验下，于是乎下载了安装程序，但苦于没有注册码。

于是通过万能的Google找到了生成注册码的算法程序，其可适用于各种版本的IDEA，只需更改代码中的 version 变量即可。

以下为可运行的源码程序，只做研读、交流之用，还希望广大IT从业者支持正版！！！

package com.xuantan.idea.keygen;import java.math.BigInteger;
import java.util.Date;
import java.util.Random;
import java.util.zip.CRC32;/*** Created by xuantan on 14/12/17.*/
public class Keygen {private static final int version = 14;/**** @param s* @param i* @param bytes* @return*/public static short getCRC(String s, int i, byte bytes[]) {CRC32 crc32 = new CRC32();if (s != null) {for (int j = 0; j < s.length(); j++) {char c = s.charAt(j);crc32.update(c);}}crc32.update(i);crc32.update(i >> 8);crc32.update(i >> 16);crc32.update(i >> 24);for (int k = 0; k < bytes.length -2; k++) {byte byte0 = bytes[k];crc32.update(byte0);}return (short) (int) crc32.getValue();}/**** @param bigInteger* @return*/public static String encodeGroups(BigInteger bigInteger) {BigInteger beginner1 = BigInteger.valueOf(0x39aa400L);StringBuilder sb = new StringBuilder();for (int i = 0; bigInteger.compareTo(BigInteger.ZERO) != 0; i++) {int j = bigInteger.mod(beginner1).intValue();String s1 = encodeGroup(j);if (i > 0) {sb.append("-");}sb.append(s1);bigInteger = bigInteger.divide(beginner1);}return sb.toString();}/**** @param i* @return*/public static String encodeGroup(int i) {StringBuilder sb = new StringBuilder();for (int j = 0; j < 5; j++) {int k = i % 36;char c;if (k < 10) {c = (char) (48 + k);} else {c = (char) ((65 + k) - 10);}sb.append(c);i /= 36;}return sb.toString();}/**** @param name* @param days* @return*/public static String MakeKey(String name, int days, int id) {id %= 100000;byte bkey[] = new byte[12];bkey[0] = (byte) 1;bkey[1] = version;Date d = new Date();long ld = (d.getTime() >> 16);bkey[2] = (byte) (ld & 255);bkey[3] = (byte) ((ld >> 8) & 255);bkey[4] = (byte) ((ld >> 16) & 255);bkey[5] = (byte) ((ld >> 24) & 255);days &= 0xffff;bkey[6] = (byte) (days & 255);bkey[7] = (byte) ((days >> 8) & 255);bkey[8] = 105;bkey[9] = -59;bkey[10] = 0;bkey[11] = 0;int w = getCRC(name, id % 100000, bkey);bkey[10] = (byte) (w & 255);bkey[11] = (byte) ((w >> 8) & 255);BigInteger pow = new BigInteger("89126272330128007543578052027888001981", 10);BigInteger mod = new BigInteger("86f71688cdd2612ca117d1f54bdae029", 16);BigInteger k0 = new BigInteger(bkey);BigInteger k1 = k0.modPow(pow, mod);String s0 = Integer.toString(id);String sz = "0";while (s0.length() != 5) {s0 = sz.concat(s0);}s0 = s0.concat("-");String s1 = encodeGroups(k1);s0 = s0.concat(s1);return s0;}public static void main(String[] args) {Random r = new Random();String key = MakeKey("yourname", 0, r.nextInt(Integer.MAX_VALUE));System.out.println(key);}
}

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